A. 50 ppm
B. 100 ppm
C. 300 ppm
D. 700 ppm
Related Mcqs:
- Acute danger to human life (i.e. death) exists, if the concentration of CO2 in atmospheric air exceeds ______________ percent (by volume)?
A. 1
B. 3
C. 7
D. 20 - Presence of nitrogen in high concentration in contaminated air reduces partial pressure of oxygen in lungs, thereby causing asphyxia (suffocation) leading to death from oxygen deficiency. Concentration of N2 in contaminated air at which it acts as a natural asphyxiate is ≥ _____________ percent?
A. 84
B. 88
C. 80
D. 92 - H2S present in gaseous stream can be removed by adsorption on _____________________?
A. Silica gel
B. Active carbon
C. Bog iron
D. Limestone powder - From pollution control point of view, the maximum permissible concentration of sulphur dioxide in atmospheric air is about ________________ ppm?
A. 5
B. 50
C. 500
D. 5000 - Which of the following causes death by asphyxiation, if its presence in atmospheric air exceeds maximum allowable concentration (i.e. > 50 ppm) ?
A. Benzopyrene
B. Peroxyacetyl nitrate
C. Carbon monoxide
D. Sulphur dioxide - Threshold limit value (TLV) means maximum permissible/acceptable concentration. TLV of phosgene in air is about ______________ ppm (parts per million)?
A. 0.002
B. 0.2
C. 1.2
D. 4.8 - As per the world health organisation (WHO) specification, the maximum permissible concentration (i.e., TLV) of particulate matter in air is _____________ μg/m3.(μg-microgram)?
A. 10
B. 90
C. 800
D. 750 - Higher concentration of nitrogen dioxide in atmospheric air causes___________________?
A. Cancer
B. Bronchitis
C. Asphyxiation
D. Corrosion - High concentration of carcinogenic hydrocarbon pollutants in atmospheric air causes____________________?
A. Cancer
B. Silicosis
C. Respiratory disease (e.g., asthma)
D. Reduced crop yield - Fluorosis (a bone disease) is caused by the presence of high concentration of ____________ in atmospheric air?
A. Hydrocarbons
B. Hydrogen fluoride
C. Hydrogen sulphides
D. Nitrogen dioxide
